The [http://www.logitech.com/349/6072 Logitech Unifying Receiver] is a wireless receiver that can connect up to six compatible wireless mice and keyboards to your computer.

The [http://www.logitech.com/349/6072 Logitech Unifying Receiver] is a wireless receiver that can connect up to six compatible wireless mice and keyboards to your computer.

The input device that comes with the receiver is already paired with it and should work out of the box through plug and play.

The input device that comes with the receiver is already paired with it and should work out of the box through plug and play.

Revision as of 09:59, 11 January 2017

The Logitech Unifying Receiver is a wireless receiver that can connect up to six compatible wireless mice and keyboards to your computer.
The input device that comes with the receiver is already paired with it and should work out of the box through plug and play.
Logitech officially supports pairing of additional devices just through their Windows and macOS software.
Pairing on Linux is supported by a small program from Benjamin Tissoires. That tool does not provide any feedback though. Other developers have built more complete pairing tools that give feedback and allow unpairing as well.

ltunify is a command-line C program that can perform pairing, unpairing and listing of devices. Solaar is a graphical Python program that integrates in your system tray and allows you to configure additional features of your input device such as swapping the functionality of Fn keys.

Now switch off the device that you want to pair (if it was on) and execute your compiled program with the appropriate device as argument:

# pairing_tool /dev/hidraw0
The receiver is ready to pair a new device.
Switch your device on to pair it (you have thirty seconds to do so).

Now switch on the device you want to pair. After a few seconds your new device should work properly.

Known Problems

Wrong device (pairing tool only)

On some systems there is more than one device that has the same name. In that case you will receive the following error message when the wrong device is choosen:

# pairing_tool /dev/hidraw1
Error: 32
write: Broken pipe

Keyboard layout via xorg.conf

With kernel 3.2 the Unifying Receiver got its own kernel module hid_logitech_dj which does not work flawlessly together with keyboard layout setting set via xorg.conf.
A temporary workaround is to use xorg-setxkbmap and set the layout manually. For example for a German layout with no deadkeys one has to execute:

$ setxkbmap -layout de -variant nodeadkeys

To automate this process one could add this line to xinitrc or the according autostart file of your windows manager respectively desktop environment.

Logitech touchpad keyboard K400r with unifying receiver M325

The Logitech keyboard K400r with integrated touchpad comes with Logitech unifying receiver M325 so the above mentioned about the keyboard layout will apply here too.

Also the integrated touchpad is recognized as 'pointer' instead of 'touchpad' so you cannot use the Touchpad Synaptics drivers.
Two finger horizontal scrolling and tapclick will work but in order to have a middle mouse button emulated you will have to add